quinoa is the grain your looking for to answer this question. Hope this helps :)
Answer: Altamira
Explanation: An important Upper Paleolithic cave in Spain where artists used exaggeration of proportion when painting a deer is Altamira.
The actual material being printed on is usually paper which is out of wood, how ever the printer may be made out of metal, and I am confused on which one you are asking about.
A. always properly cite your sources